/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemComponent.h
Notifies when GameplayEffectSpec is blocked by an ActiveGameplayEffect due to immunity
typedef TMulticastDelegate_TwoParams< void, const [FGameplayEffectSpec](API\Plugins\GameplayAbilities\FGameplayEffectSpec) &, const [FActiveGameplayEffect](API\Plugins\GameplayAbilities\FActiveGameplayEffect) * > FImmunityBlockGE